Before September last year, the only LW Pro option was for 6 months support. Now they offer a 12 month support with updates for that period of support. Over the last month of support they offer a discount to continue (they send emails over that period). After the support period is finished & if you haven't continued support, your email address is auto-removed from their database. 4 years ago is a long time. No they do not respond to emails that are not from present pro users.

You have a choice of getting Pro or using Basic. Not a dramatic amount of difference anyway.